PIC16F716 Microchip Technology, PIC16F716 Datasheet - Page 83

• Manufacturer Part Number: PIC16F716
• Description: 8-bit Flash-based Microcontroller with A/D Converter and Enhanced Capture/Compare/PWM
• Manufacturer: Microchip Technology

 2003 Microchip Technology Inc.
RETLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
RETURN
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
TABLE
Return with Literal in W
[ label ]
0
k
TOS
None
11
The W register is loaded with
the eight bit literal ‘k’. The
program counter is loaded from
the top of the stack (the return
address). This is a two-cycle
instruction.
1
2
CALL TABLE;W contains table
•
•
•
ADDWF PC;W = offset
RETLW k1;Begin table
RETLW k2;
•
•
•
RETLW kn; End of table
Before Instruction
After Instruction
Return from Subroutine
[ label ]
None
TOS
None
00
Return from subroutine. The
stack is POPed and the top of
the stack (TOS) is loaded into
the program counter. This is a
two-cycle instruction.
1
2
RETURN
After Interrupt
k
(W);
;offset value
;W now has table value
W = 0x07
W = value of k8
PC = TOS
255
PC
PC
01xx
0000
RETLW k
RETURN
kkkk
0000
kkkk
1000
Preliminary
RLF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Rotate Left f through Carry
[ label ]
0
d
See description below
C
00
The contents of register ‘f’ are
rotated one bit to the left through
the Carry Flag. If ‘d’ is 0 the result
is placed in the W register. If ‘d’ is
1 the result is stored back in
register ‘f’.
1
1
RLF
Before Instruction
After Instruction
f
[0,1]
PIC16F716
REG1=1110 0110
C
REG1=1110 0110
W
C
C
127
= 0
= 1100 1100
= 1
RLF
1101
REG1, 0
REGISTER F
DS41206A-page 81
f,d
dfff
ffff